# A079120 (b-file synthesized from sequence entry) 0 1 1 3 2 7 3 22 4 63 5 180 6 512 7 1457 8 4144 9 11791 10 33564 11 95580 12 272280 13 775922 14 2211891 15 6307338 16 17991183 17 51333407 18 146508751 19 418260894 20 1194397553 21 3411667838 22 9747639585 23 27857756981 24 79635405673 25 227708537573 26 651276560978